<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="index/sign/sc" enctype="multipart/form-data" method="post">
    选择文件:
    <input type="file" name="aaa">
    选择文件:
    <input type="file" name="bbb">
    <button type="submit">上传</button>
</form>
</body>
</html>